Abstract
In the present paper, the influence of grain morphology on the textures of multiphase steels measured after phase transformation is investigated. Especially, it is shown that the presence of very elongated grains in the product phase can strongly influence the classical quantitative determination of the texture of this phase from surface measurements (in X-ray diffraction or EBSD). Thus, a method is proposed to deduce the “real” texture from the “apparent” one, measured within a plane. It is then shown that for the investigated multiphase steel, for which phase transformation has occurred either from deformed or recrystallized austenite, this correction provides a very good quantitative agreement between corrected experimental product (ferrite) textures and those obtained from the parent (austenite) phase, assuming a KS or slightly different orientation relationship, without considering any variant selection.
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Notes
Using the convention recently proposed by Zhang and Kelly [1], in what follows, the (FCC) phase will be called the matrix (M) phase, whereas the (BCC) phase will be called the product (P) phase.
The vector method is a so-called discrete texture method, which is based on the decomposition of the Euler space into a finite number of boxes of equal volume, taking into account the crystal symmetry. For cubic crystals, the reduced number of 2016 boxes has been shown to be the optimal number to represent with sufficient accuracy the orientation distribution function of moderately textured materials.
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Cabus, C., Réglé, H. & Bacroix, B. The influence of grain morphology on texture measured after phase transformation in multiphase steels. J Mater Sci 49, 5646–5657 (2014). https://doi.org/10.1007/s10853-014-8282-4
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DOI: https://doi.org/10.1007/s10853-014-8282-4